One kind of self-locking sealed tank cleaning apparatus

The invention relates to a closed self-locking cleaning device of a tank, comprising a rigid section which is divided into at least two sections, and an expansion section which is arranged between an adjacent section and the rigid section; the bottom end of the rigid section is adapted to and connected with the wall of the tank in a closed way; the top end of the rigid section is provided with a compression cover; a steam inlet pipe which is connected inside the tank and a sewage pipe which is connected to the bottom of the tank are arranged on the compression cover; and the inner side of the rigid section is provided with at least one group of self-locking mechanism which is buckled and matched with the corner of the inner side of the tank wall. The closed self-locking cleaning device of the tank adopts a positive pressure tank cleaning technology, fully utilizes the steam in the tank while ensuring that the pressure in the tank meets the conditions of equipment safety requirements, so that the steam heat utilization rate is improved, the air pollution is reduced and a certain materials can be recovered, and consequently, the closed self-locking cleaning device of the tank has the advantages of environmental protection, energy saving, high efficiency, low cost and the like.